diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/nfs/blocklayout/blocklayout.h')
| -rw-r--r-- | ANDROID_3.4.5/fs/nfs/blocklayout/blocklayout.h | 210 |
1 files changed, 0 insertions, 210 deletions
diff --git a/ANDROID_3.4.5/fs/nfs/blocklayout/blocklayout.h b/ANDROID_3.4.5/fs/nfs/blocklayout/blocklayout.h deleted file mode 100644 index 03350690..00000000 --- a/ANDROID_3.4.5/fs/nfs/blocklayout/blocklayout.h +++ /dev/null @@ -1,210 +0,0 @@ -/* - * linux/fs/nfs/blocklayout/blocklayout.h - * - * Module for the NFSv4.1 pNFS block layout driver. - * - * Copyright (c) 2006 The Regents of the University of Michigan. - * All rights reserved. - * - * Andy Adamson <andros@citi.umich.edu> - * Fred Isaman <iisaman@umich.edu> - * - * permission is granted to use, copy, create derivative works and - * redistribute this software and such derivative works for any purpose, - * so long as the name of the university of michigan is not used in - * any advertising or publicity pertaining to the use or distribution - * of this software without specific, written prior authorization. if - * the above copyright notice or any other identification of the - * university of michigan is included in any copy of any portion of - * this software, then the disclaimer below must also be included. - * - * this software is provided as is, without representation from the - * university of michigan as to its fitness for any purpose, and without - * warranty by the university of michigan of any kind, either express - * or implied, including without limitation the implied warranties of - * merchantability and fitness for a particular purpose. the regents - * of the university of michigan shall not be liable for any damages, - * including special, indirect, incidental, or consequential damages, - * with respect to any claim arising out or in connection with the use - * of the software, even if it has been or is hereafter advised of the - * possibility of such damages. - */ -#ifndef FS_NFS_NFS4BLOCKLAYOUT_H -#define FS_NFS_NFS4BLOCKLAYOUT_H - -#include <linux/device-mapper.h> -#include <linux/nfs_fs.h> -#include <linux/sunrpc/rpc_pipe_fs.h> - -#include "../pnfs.h" -#include "../netns.h" - -#define PAGE_CACHE_SECTORS (PAGE_CACHE_SIZE >> SECTOR_SHIFT) -#define PAGE_CACHE_SECTOR_SHIFT (PAGE_CACHE_SHIFT - SECTOR_SHIFT) - -struct block_mount_id { - spinlock_t bm_lock; /* protects list */ - struct list_head bm_devlist; /* holds pnfs_block_dev */ -}; - -struct pnfs_block_dev { - struct list_head bm_node; - struct nfs4_deviceid bm_mdevid; /* associated devid */ - struct block_device *bm_mdev; /* meta device itself */ - struct net *net; -}; - -enum exstate4 { - PNFS_BLOCK_READWRITE_DATA = 0, - PNFS_BLOCK_READ_DATA = 1, - PNFS_BLOCK_INVALID_DATA = 2, /* mapped, but data is invalid */ - PNFS_BLOCK_NONE_DATA = 3 /* unmapped, it's a hole */ -}; - -#define MY_MAX_TAGS (15) /* tag bitnums used must be less than this */ - -struct my_tree { - sector_t mtt_step_size; /* Internal sector alignment */ - struct list_head mtt_stub; /* Should be a radix tree */ -}; - -struct pnfs_inval_markings { - spinlock_t im_lock; - struct my_tree im_tree; /* Sectors that need LAYOUTCOMMIT */ - sector_t im_block_size; /* Server blocksize in sectors */ - struct list_head im_extents; /* Short extents for INVAL->RW conversion */ -}; - -struct pnfs_inval_tracking { - struct list_head it_link; - int it_sector; - int it_tags; -}; - -/* sector_t fields are all in 512-byte sectors */ -struct pnfs_block_extent { - struct kref be_refcnt; - struct list_head be_node; /* link into lseg list */ - struct nfs4_deviceid be_devid; /* FIXME: could use device cache instead */ - struct block_device *be_mdev; - sector_t be_f_offset; /* the starting offset in the file */ - sector_t be_length; /* the size of the extent */ - sector_t be_v_offset; /* the starting offset in the volume */ - enum exstate4 be_state; /* the state of this extent */ - struct pnfs_inval_markings *be_inval; /* tracks INVAL->RW transition */ -}; - -/* Shortened extent used by LAYOUTCOMMIT */ -struct pnfs_block_short_extent { - struct list_head bse_node; - struct nfs4_deviceid bse_devid; - struct block_device *bse_mdev; - sector_t bse_f_offset; /* the starting offset in the file */ - sector_t bse_length; /* the size of the extent */ -}; - -static inline void -BL_INIT_INVAL_MARKS(struct pnfs_inval_markings *marks, sector_t blocksize) -{ - spin_lock_init(&marks->im_lock); - INIT_LIST_HEAD(&marks->im_tree.mtt_stub); - INIT_LIST_HEAD(&marks->im_extents); - marks->im_block_size = blocksize; - marks->im_tree.mtt_step_size = min((sector_t)PAGE_CACHE_SECTORS, - blocksize); -} - -enum extentclass4 { - RW_EXTENT = 0, /* READWRTE and INVAL */ - RO_EXTENT = 1, /* READ and NONE */ - EXTENT_LISTS = 2, -}; - -static inline int bl_choose_list(enum exstate4 state) -{ - if (state == PNFS_BLOCK_READ_DATA || state == PNFS_BLOCK_NONE_DATA) - return RO_EXTENT; - else - return RW_EXTENT; -} - -struct pnfs_block_layout { - struct pnfs_layout_hdr bl_layout; - struct pnfs_inval_markings bl_inval; /* tracks INVAL->RW transition */ - spinlock_t bl_ext_lock; /* Protects list manipulation */ - struct list_head bl_extents[EXTENT_LISTS]; /* R and RW extents */ - struct list_head bl_commit; /* Needs layout commit */ - struct list_head bl_committing; /* Layout committing */ - unsigned int bl_count; /* entries in bl_commit */ - sector_t bl_blocksize; /* Server blocksize in sectors */ -}; - -#define BLK_ID(lo) ((struct block_mount_id *)(NFS_SERVER(lo->plh_inode)->pnfs_ld_data)) - -static inline struct pnfs_block_layout * -BLK_LO2EXT(struct pnfs_layout_hdr *lo) -{ - return container_of(lo, struct pnfs_block_layout, bl_layout); -} - -static inline struct pnfs_block_layout * -BLK_LSEG2EXT(struct pnfs_layout_segment *lseg) -{ - return BLK_LO2EXT(lseg->pls_layout); -} - -struct bl_pipe_msg { - struct rpc_pipe_msg msg; - wait_queue_head_t *bl_wq; -}; - -struct bl_msg_hdr { - u8 type; - u16 totallen; /* length of entire message, including hdr itself */ -}; - -#define BL_DEVICE_UMOUNT 0x0 /* Umount--delete devices */ -#define BL_DEVICE_MOUNT 0x1 /* Mount--create devices*/ -#define BL_DEVICE_REQUEST_INIT 0x0 /* Start request */ -#define BL_DEVICE_REQUEST_PROC 0x1 /* User level process succeeds */ -#define BL_DEVICE_REQUEST_ERR 0x2 /* User level process fails */ - -/* blocklayoutdev.c */ -ssize_t bl_pipe_downcall(struct file *, const char __user *, size_t); -void bl_pipe_destroy_msg(struct rpc_pipe_msg *); -struct block_device *nfs4_blkdev_get(dev_t dev); -int nfs4_blkdev_put(struct block_device *bdev); -struct pnfs_block_dev *nfs4_blk_decode_device(struct nfs_server *server, - struct pnfs_device *dev); -int nfs4_blk_process_layoutget(struct pnfs_layout_hdr *lo, - struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); - -/* blocklayoutdm.c */ -void bl_free_block_dev(struct pnfs_block_dev *bdev); - -/* extents.c */ -struct pnfs_block_extent * -bl_find_get_extent(struct pnfs_block_layout *bl, sector_t isect, - struct pnfs_block_extent **cow_read); -int bl_mark_sectors_init(struct pnfs_inval_markings *marks, - sector_t offset, sector_t length); -void bl_put_extent(struct pnfs_block_extent *be); -struct pnfs_block_extent *bl_alloc_extent(void); -int bl_is_sector_init(struct pnfs_inval_markings *marks, sector_t isect); -int encode_pnfs_block_layoutupdate(struct pnfs_block_layout *bl, - struct xdr_stream *xdr, - const struct nfs4_layoutcommit_args *arg); -void clean_pnfs_block_layoutupdate(struct pnfs_block_layout *bl, - const struct nfs4_layoutcommit_args *arg, - int status); -int bl_add_merge_extent(struct pnfs_block_layout *bl, - struct pnfs_block_extent *new); -int bl_mark_for_commit(struct pnfs_block_extent *be, - sector_t offset, sector_t length, - struct pnfs_block_short_extent *new); -int bl_push_one_short_extent(struct pnfs_inval_markings *marks); -struct pnfs_block_short_extent * -bl_pop_one_short_extent(struct pnfs_inval_markings *marks); -void bl_free_short_extents(struct pnfs_inval_markings *marks, int num_to_free); - -#endif /* FS_NFS_NFS4BLOCKLAYOUT_H */ |